SU30318A1 - A device for simultaneous transmission of the same program by radio and by wire - Google Patents

Description

The present invention relates to devices for simultaneous transmission of the same program over the radio and by wire with the power of a transmission line from one of the transmitter stages through a transformer or through reactive or watt impedance included in the audio current frequency transmission line. According to the invention, in order to better ensure the safety, lines from overvoltages, which may occur in the event of any accident, with a transmitter in parallel with the impedance of the transmitter, or the secondary winding of the transformer, are connected in parallel with the transmitter capacitor and reactive coil. A line is attached to the terminals of this coil. The reactive coil is calculated so that in case of overvoltages on the resistance terminals or in the primary circuit of the transformer, an increase in the current in the shunt coil would cause the core of this coil to saturate and, due to a drop in 222

spraying in a capacitor would not cause an overvoltage in the line. Instead of a capacitor, you can turn on ohmic or inductive resistance here.

In the schematic drawing of FIG. 1, 2 and 3 depict various versions of the proposed device; FIG. 4, 5, 6, 7, 8 and 9 other forms of implementation of the latter.

FIG. Figure 1 shows the inclusion in the anode supply wire of a transmitter of resistance R and parallel to it a capacitor 10 and a reactive coil 77, in parallel to which a line 5 is connected. In FIG. Figure 2 shows the connection, in parallel of the reactive coil L connected in the anode feed wire, the reactive coils 77 and 72, parallel to one of which is attached the line 5. In FIG. Figure 3 shows the parallel connection of the secondary winding 4 of the transformer T, the primary winding 3 of which is included in the anode supply wire of the transmitter, the ohmic resistance 7 J and the reactive coil 7 / to which the line 5 is connected. The form of the device according to claim 1, characterized by the use of cascade connection of two or several

transformers, the midpoints of the windings of which are grounded for the predisposition of the line in the event of a transmitter failure.

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